<template>
		<view class="content">
			<view class="navbar">
				<view 
					v-for="(item, index) in navList" 
					:key="index" 
					class="nav-item" 
					:class="{current: tabCurrentIndex === index}"
					@click="tabClick(index)"
				>
					{{item.text}}
				</view>
			</view>
			
			<swiper :current="tabCurrentIndex" class="swiper-box" duration="300" @change="changeTab">
				<swiper-item class="tab-content" v-for="(tabItem,tabIndex) in navList" :key="tabIndex">
					<scroll-view 
						class="list-scroll-content" 
						scroll-y
						@scrolltolower="loadData"
					>
						<!-- 空白页 -->
						<empty v-if="tabItem.loaded === true && tabItem.orderList.length === 0"></empty>
							<!-- <view class="empty-content">
								<img src="../../static/empty.png" alt="" srcset="" class="empty-content-image"/>
							</view> -->
						<!-- 订单列表 -->
						<view 
							v-for="(item,index) in tabItem.orderList" :key="index"
							class="order-item"
						>
							<view class="i-top b-b">
								<text class="time">{{item.time}}</text>
								<text class="state" :style="{color: item.stateTipColor}">{{item.stateTip}}</text>
								<text 
									v-if="item.state===9" 
									class="del-btn yticon icon-iconfontshanchu1"
									@click="deleteOrder(index)"
								></text>
							</view>
							
							<scroll-view v-if="item.goodsList.length > 1" class="goods-box" scroll-x>
								<view
									v-for="(goodsItem, goodsIndex) in item.goodsList" :key="goodsIndex"
									class="goods-item"
								>
									<image class="goods-img" :src="goodsItem.image" mode="aspectFill"></image>
								</view>
							</scroll-view>
							<view 
								v-if="item.goodsList.length === 1" 
								class="goods-box-single"
								v-for="(goodsItem, goodsIndex) in item.goodsList" :key="goodsIndex"
							>
								<image class="goods-img" :src="goodsItem.image" mode="aspectFill"></image>
								<view class="right">
									<text class="title clamp">{{goodsItem.title}}</text>
									<text class="attr-box">{{goodsItem.attr}}  x {{goodsItem.number}}</text>
									<text class="price">{{goodsItem.price}}</text>
								</view>
							</view>
							
							<view class="price-box">
								共
								<text class="num">7</text>
								件商品 实付款
								<text class="price">143.7</text>
							</view>
							<view class="action-box b-t" v-if="item.state != 9">
								<button class="action-btn" @click="cancelOrder(item)">取消订单</button>
								<button class="action-btn recom">立即支付</button>
							</view>
						</view>
						 
						<uni-load-more :status="tabItem.loadingType"></uni-load-more>
						
					</scroll-view>
				</swiper-item>
			</swiper>
		</view>
</template>

<script>
	import Json from "../../Json"
	export default{
		comments:{
			
		},
		data() {
			return {
				tabCurrentIndex: 0,
				navList: [{
						state: 0,
						text: '全部',
						loadingType: 'more',
						orderList: []
					},
					{
						state: 1,
						text: '待付款',
						loadingType: 'more',
						orderList: []
					},
					{
						state: 2,
						text: '待收货',
						loadingType: 'more',
						orderList: []
					},
					{
						state: 3,
						text: '待评价',
						loadingType: 'more',
						orderList: []
					},
					{
						state: 4,
						text: '售后',
						loadingType: 'more',
						orderList: []
					}
				],
			};
		},
		methods:{
			//获取订单列表
			loadData(source){
				//这里是将订单挂载到tab列表下
				let index = this.tabCurrentIndex;
				let navItem = this.navList[index];
				let state = navItem.state;
				
				if(source === 'tabChange' && navItem.loaded === true){
					//tab切换只有第一次需要加载数据
					return;
				}
				if(navItem.loadingType === 'loading'){
					//防止重复加载
					return;
				}
				
				navItem.loadingType = 'loading';
				
				setTimeout(()=>{
					let orderList = Json.orderList.filter(item=>{
						//添加不同状态下订单的表现形式
						item = Object.assign(item, this.orderStateExp(item.state));
						//演示数据所以自己进行状态筛选
						if(state === 0){
							//0为全部订单
							return item;
						}
						return item.state === state
					});
					orderList.forEach(item=>{
						navItem.orderList.push(item);
					})
					//loaded新字段用于表示数据加载完毕，如果为空可以显示空白页
					this.$set(navItem, 'loaded', true);
					
					//判断是否还有数据， 有改为 more， 没有改为noMore 
					navItem.loadingType = 'more';
				}, 600);	
			}, 
			//swiper 切换
			changeTab(e){
				this.tabCurrentIndex = e.target.current;
				this.loadData('tabChange');
			},
			//顶部tab点击
			tabClick(index){
				this.tabCurrentIndex = index;
			},
			//删除订单
			deleteOrder(index){
				uni.showLoading({
					title: '请稍后'
				})
				setTimeout(()=>{
					this.navList[this.tabCurrentIndex].orderList.splice(index, 1);
					uni.hideLoading();
				}, 600)
			},
			//取消订单
			cancelOrder(item){
				uni.showLoading({
					title: '请稍后'
				})
				setTimeout(()=>{
					let {stateTip, stateTipColor} = this.orderStateExp(9);
					item = Object.assign(item, {
						state: 9,
						stateTip, 
						stateTipColor
					})
					
					//取消订单后删除待付款中该项
					let list = this.navList[1].orderList;
					let index = list.findIndex(val=>val.id === item.id);
					index !== -1 && list.splice(index, 1);
					
					uni.hideLoading();
				}, 600)
			},
			//订单状态文字和颜色
			orderStateExp(state){
				let stateTip = '',
					stateTipColor = '#fa436a';
				switch(+state){
					case 1:
						stateTip = '待付款'; break;
					case 2:
						stateTip = '待发货'; break;
					case 9:
						stateTip = '订单已关闭'; 
						stateTipColor = '#909399';
						break;
						
					//更多自定义
				}
				return {stateTip, stateTipColor};
			}
		}
	}
	
</script>

<style lang="scss">
		@font-face {
		font-family: yticon;
		font-weight: normal;
		font-style: normal;
		src: url('//at.alicdn.com/t/c/font_4572519_wroujmx5uc.ttf?t=1717413815770') format('truetype');
		}
		
		.yticon {
		font-family: "yticon" !important;
		font-size: 16px;
		font-style: normal;
		-webkit-font-smoothing: antialiased;
		-moz-osx-font-smoothing: grayscale;
		}
		
		.icon-xingxing:before {
		content: "\e700";
		}
		
		.icon-all_tips:before {
		content: "\e60d";
		}
		
		.icon-xiangyoujiantou:before {
		content: "\e65f";
		}
		page, .content{
			background: #f8f8f8;
			height: 100%;
		}
		
		.swiper-box{
			height: calc(100% - 40px);
		}
		.list-scroll-content{
			height: 100%;
		}
		
		.navbar{
			display: flex;
			height: 40px;
			padding: 0 5px;
			background: #fff;
			box-shadow: 0 1px 5px rgba(0,0,0,.06);
			position: relative;
			z-index: 10;
			.nav-item{
				flex: 1;
				display: flex;
				justify-content: center;
				align-items: center;
				height: 100%;
				font-size: 15px;
				color: #303133;
				position: relative;
				&.current{
					color: #fa436a;
					&:after{
						content: '';
						position: absolute;
						left: 50%;
						bottom: 0;
						transform: translateX(-50%);
						width: 44px;
						height: 0;
						border-bottom: 2px solid #fa436a;
					}
				}
			}
		}
		.empty-content{
			    display: flex;
			    align-items: center;
			    justify-content: center;
			    flex-direction: column;
			    position: fixed;
			    left: 0;
			    top: 0;
			    right: 0;
			    bottom: 0;
			    background: #f8f8f8;
			    padding-bottom: 64px;
				.empty-content-image{
					width: 106px;
					height: 106px;
				}
		}
		
		.order-item{
			display: flex;
			flex-direction: column;
			padding-left: 30upx;
			background: #fff;
			margin-top: 16upx;
			.i-top{
				display: flex;
				align-items: center;
				height: 80upx;
				padding-right:30upx;
				font-size: 28upx;
				color: #303133;
				position: relative;
				.time{
					flex: 1;
				}
				.state{
					color: #606266;
				}
				.del-btn{
					padding: 10upx 0 10upx 36upx;
					font-size: 32upx;
					color: #909399;
					position: relative;
					&:after{
						content: '';
						width: 0;
						height: 30upx;
						border-left: 1px solid #DCDFE6;
						position: absolute;
						left: 20upx;
						top: 50%;
						transform: translateY(-50%);
					}
				}
			}
			/* 多条商品 */
			.goods-box{
				height: 160upx;
				padding: 20upx 0;
				white-space: nowrap;
				.goods-item{
					width: 120upx;
					height: 120upx;
					display: inline-block;
					margin-right: 24upx;
				}
				.goods-img{
					display: block;
					width: 100%;
					height: 100%;
				}
			}
			/* 单条商品 */
			.goods-box-single{
				display: flex;
				padding: 20upx 0;
				.goods-img{
					display: block;
					width: 120upx;
					height: 120upx;
				}
				.right{
					flex: 1;
					display: flex;
					flex-direction: column;
					padding: 0 30upx 0 24upx;
					overflow: hidden;
					.title{
						font-size: 28upx + 2upx;
						color: #303133;
						line-height: 1;
					}
					.attr-box{
						font-size:24upx + 2upx;
						color: #909399;
						padding: 10upx 12upx;
					}
					.price{
						font-size: 28upx + 2upx;
						color: #303133;
						&:before{
							content: '￥';
							font-size:24upx;
							margin: 0 2upx 0 8upx;
						}
					}
				}
			}
			
			.price-box{
				display: flex;
				justify-content: flex-end;
				align-items: baseline;
				padding: 20upx 30upx;
				font-size:24upx + 2upx;
				color:#909399;
				.num{
					margin: 0 8upx;
					color: #303133;
				}
				.price{
					font-size:32upx;
					color: #303133;
					&:before{
						content: '￥';
						font-size:24upx;
						margin: 0 2upx 0 8upx;
					}
				}
			}
			.action-box{
				display: flex;
				justify-content: flex-end;
				align-items: center;
				height: 100upx;
				position: relative;
				padding-right: 30upx;
			}
			.action-btn{
				width: 160upx;
				height: 60upx;
				margin: 0;
				margin-left: 24upx;
				padding: 0;
				text-align: center;
				line-height: 60upx;
				font-size:24upx + 2upx;
				color: #303133;
				background: #fff;
				border-radius: 100px;
				&:after{
					border-radius: 100px;
				}
				&.recom{
					background: #fff9f9;
					color: #606266;
					&:after{
						border-color: #f7bcc8;
					}
				}
			}
		}
</style>